Trek Bike sizing L or XL

[wapad]

I'm looking at getting a Trek Top Fuel, I think I'm at  the edge of Large  with a saddle height set to 77cm, is there any benefit in getting a larger bike where you are considered more in the sweet spot, most try get a smaller bike because its lighter.

at 185cm-6'1" i think I fit on a large any thoughts on the LargerXL frame I'm assuming more comfort due to higher stack height etc. 

[splat]

Your leg vs torso length could play a role in that decision.
Tall seatpost, longer stem and a stack of spacers on a large could give you a similar position to an XL.
Or you could be super flexible and have a massive saddle to bar drop.

The weight difference between the two wouldn't really be that much, but the geometry may be a factor. Smaller bike would probably have a shorter wheelbase and lower stand over, so might feel more nimble. Bigger bike would feel more stable.

If you are buying from a dealer, they are usually equipped to do a good bike set-up and help you with that decision

[RobertWhitehead]

At 1.85 I will go with an XL and shorten the stem with wider bars. I've been riding Trek since 2011 😁

[JuliBoB]

@ 1.85m go for XL. I am 1.79, with longer leg length and literrally on the borderline with my Fuel EX 2022 model size Large. So go for the XL and not the L. 

[ians H2Sport]

I have just been through the same thing, Trek too. I am 186 cm so on the top end of a large (Supercaliber). Ended up going with the XL, only one ride so far but it seems like the correct decision. 

[Chadvdw67]

I am 183cm and when I had a Top Fuel I went for a Large, fit me like a glove

[wapad]

Thanks for the input all good points ... so sounds like an XL would be the one. 

[Rudi Pollard]

I'm 186cm with a saddle height of 79,5cm. I bought a Large Trek Top-Fuel frame second hand and I've always been fitted right on the cut line between a Large and X Large on various brands.

I've had to fit quite a long seatpost and had to make some adjustments with the cockpit but got a good comfy fit on the bike. I think I would have been able to get a similar position on the XL.  

I think you'll be able to make either work for you is what I am trying to say, but try to get the shop to fit you and advise.

[ChrisF]

3 hours ago, splat said:

....If you are buying from a dealer, they are usually equipped to do a good bike set-up and help you with that decision

 

Let's HOPE he is NOT buying for the dealer in Paarl ... who sells what he has on the floor, rather than taking a moment to make sure his clients gets the correct size bike. 

 

 

EDIT - some of thee most expensive school fees I paid in this sport .... and not some weekend casual, nope the owner of the store worked me over like that  .....

Edited May 10, 2023 by ChrisF

[Frosty]

How much are you spending on the bike?

For a fraction of the cost, a bike fit will give your the starting point to decide on frame size. Tell the fitter you want to buy a new bike and let them measure you up before you buy.

Based on your measurements, you can then calculate your optimal setup once you have the bike, instead of having to buy extra components afterwards. Some examples were given above, like stem length and bar width. Stack height, seat post length, type of saddle and more will make a big difference if you are primed for comfort.

Unless you’re racing for a living, comfort and power should be the preferred two corners of the power-aero-comfort triangle.

[wapad]

The Bike fit things sounds like great idea, I've had a few but in my experience the fit becomes a bit subjective from the saddle to the bars, they all mostly get the pedal stroke right, but i'm yet to meet someone that can say ... with your measurements you should buy such and such frame size in said brand. 

Listening to the points its probably gonna be an XL, I dont want to much drop  and I dont want to prop the bars up with spacers  

 

Thanks for the pointers 

[thebob]

Just bear in mind the new Top Fuels are long bikes. Both in reach and effective top tube length. Try and ride both sizes before you buy

[MORNE]

If you already own a bike you like and it fits well, take this measurement and then go do the same with the new bike. All my bikes are within a few mm using this method. (Centre BB to the imaginary line between your grips) you’ll know instantly if a bike is too big this way.

https://www.leelikesbikes.com/rad-bike-setup.html

Edited May 10, 2023 by MORNE

[wisecrack]

I have a height of 1,86m/6,2 feet. Trust me an XL will be a better fit if you have a long inseam.

I bought a cannondale and although it's not a Trek with a 60mm stem and 760mm wide bars its an incredible comfortable ride.

Your saddle to handlebar drop will be less and that alone is reason enough.

[Matthew___robertson]

On 5/10/2023 at 9:27 AM, RobertWhitehead said:

At 1.85 I will go with an XL and shorten the stem with wider bars. I've been riding Trek since 2011 😁

if you have been riding trek since 2011 i’m sure you can help my i have a similar question i’m 15 and im looking at the trek slash 8 but they only have a XL im pretty sure im still growing im normal a large and im 1.83 it’s such a tough decision because I can’t find any XL’s I can sit on… however I know it’s a different brand but my Giant E Bike is an XL and I fit pretty much perfectl

[ChrisF]

4 minutes ago, Matthew___robertson said:

if you have been riding trek since 2011 i’m sure you can help my i have a similar question i’m 15 and im looking at the trek slash 8 but they only have a XL im pretty sure im still growing im normal a large and im 1.83 it’s such a tough decision because I can’t find any XL’s I can sit on… however I know it’s a different brand but my Giant E Bike is an XL and I fit pretty much perfectl

 

1. Sizing between brands differ vastly !!  I loved the fit of the L Scott.  No way I could ride the L Giant.

 

Heck, a buddy had a L Scott, just ordered the new L Scott.  Sure 10 years between them.  He had to drop the seat post ALL the way down ... only the lift of the cleats made it work .... few nervous moments there !!!

 

Never ever trust a sizing chart.  Do a test ride.

 

 

2.  Couple of posts above have confirmed there IS STOCK in L.  Sounds like it is limited and may be consigned to other stores already .... phone calls ... track em down !!!  Many shops are poor with emails, topic for a different day ...

 

 

3.  Your shop needs to move stock !!!  Basic business ..... their answers are often tainted by this business requirement ... learn this lesson early, and filter answers accordingly.

 

4. Age and growth spurts .... one of the most unpredictable, and expensive, realities of having kids.  So very tempting to say buy the XL "you will grow into it".  But ... if your next growth spurt is in 9 months time, and if some geometry on that bike does not work for you .... it can cause all kinds of injuries and issues ....

 

 

Suggestion .... does your current ride still fit you ?  Ride it until that next growth spurt ....